Process for the manufacture of ammonia



wFeteflteci Dec, 4, 2923.-

. messes UNETEQ S'E'KQTES @FFEQE Ives VIALFRID osnsusueefor momememzvxx,NEAR STOCKHOLM, SWEDEN, AS- SIGNOR T NORSK HYDRO-ELEKTRISKKvAELs'roFsimIEsELsKAB, 0s cums- TIANIA, uonwsy;

' success see we stnuorsec'rosmos AMMGZNlfi No Beaming.

To all whom it may con-cam Be ,it known that 1, 1mm lVALFRIo Cummunuo,a, subject of the King of Sweden, residing at Lidingo-Brevik, nearStockholm, .10 l

6 To the Klngdom of Sweden. have invented certain new end, usefulImprovements in Processesfor the Manufactured Ammonia; I and I dohereliy declare the following to be a full; clear, and exact descriptionof the in,-

10 vention, such as will enable others skilled in the. art to which itappertsins to make and use the same. b e

' It is known that in thesyntheticel prepv oration of nmmonie 'with'theuse of a conm tact substance or catalyst-such es iron and.

vother heavy metals. that the oxides, by

dratesysalts and ofiher compounds of the metals of the elkelies andslkalme'em'ths cause a considerable increase m'the cetefz o lyticaction.

I have now discovered that among the above mentioned promoters thecyenides of alkaline metu-lsend elkeline'earth metals particularijzdistinguish themselves bye specially great increase in the 'outputwhenthe contact-substances used are iron, nickel, cobaltfchromium "ormanganese; The aotive influence of these cyenixles surpasses many timesthat of the other salts, This fact is proved by the circumstance that;for in- Application filed March 3, 1921; Serial No. 4%,553

stance carbonate of potassium to which iron powder is added hurdiyQfOdllCES perceptible quantities of uuuuouia zit a. pressure of 80atmospheres and 375 eentigrade,.whilst under the same conditions oneobtains, when using cyanide of potassium us a promoter, a very good andincessunt yield of mumonia.

One condition for obtaining good i'csults is that the oxygen compoundsof the above mentioned metals are not present either before oz after thecatalysis.

I cioim- The process of; synthesizing ammonia from its elementstundevpressure, which comprises passing amixture of nitrogen e-nd hydrogenunder heat and pressure in contact with s catalyst consisting of s metalof the iron group, and a promoter consist in of u cyanide ofan'alkn'iineous metsl said catalyst not including the decompositionproduct of'a complex cyanide of iron and up ulkalineous metal.

In testimony that I chum the foregoing as my invention, I have signed myname in presence of two subscribing witnesses.

IVAR WQALF RID CEDERBERG Witnesses iii. Su'uussoiv, lViLLIAM L. PEEK.

